Papers relating to Egerton Phillimore's academic pursuits, reflecting his wide-ranging interests and the disorderly fashion in which he went about his work.

A glossary of Welsh common, personal, and place-names, purporting to trace their derivation from Greek.

'Llyfr Newydd Cyfochraeth ... Enwau, Ymadroddion, Traddodiad, Chwedloniaeth, a Llên, Groeg-Cymraeg, wedi eu Taflennu'n Gyfochrol, a'u hegluro ag enghreifftiau o'r clasuron. Y Gyferbyniaeth yn ol Arddull Deheubarth Cymru. Gan Gerwyn Wyn', being a glossary, with index, purporting to trace from Greek the derivation of Welsh (especially Carmarthenshire) common, personal, and place names. The volume was submitted for competition at the National Eisteddfod held at Caernarvon, 1935.

A composite volume of transcripts, biographies and miscellaneous notes almost entirely in the hand of D. Silvan Evans. They include 'Helfa Hawdd ei Hebgor' (published in Y Geninen, 1887, pp. 200-204) (with instructions to the printer in the hand of [John Thomas, 'Eifionydd']); 'Brigant, neu Chware'r Brigant'; 'Canau' or poems in free metres transcribed by H[ugh] B[rython] H[ughes], partly in [18]74; 'Buchedd Marthin Sant'; 'Biographia Cambrensis: Intended as A Supplement to "Enwogion Cymru" by D. Silvan Evans; 'Cronfa Mawddwy ... neu Manion Mawddwy: 1863', largely consisting of rough notes on Welsh etymology, dialect words, place and personal names, etc.; etc. Mounted in the volume is a holograph letter from the Reverend E[benezer] W[ood] Edwards, Ruabon Vicarage to [D. Silvan Evans], [18]64 (date (1820) of birth and christening of [Sir] W[atkin] W[illiams] Wynn). Manuscripts in the Llanover and British Museum collections are quoted as sources of several of the transcripts. The spine is lettered 'Manion Mawddwy'.

A volume entitled 'Cyfrol III. Nodion Cyffredinol', covering the period May 1925-April 1926. The entries relate to domestic and international politics, the writer's removal to Chester, the writer's donation of nearly one thousand books to Llanelly Public Library, the death of the Rev. J. Towyn Jones, M.P., and of Arthur Mee, Welsh place-names, Welsh grammar, the works of Xenophon and Aristotle, numerals used by Cumberland shepherds, etc. Also included in the volume are lists of dialect words from the Llanelly district and of Welsh land measurements.

Notes, transcripts and drafts of articles published by Egerton Phillimore, 1881-1937, relating to manuscripts, history, literature, genealogy, place-names, grammar, etymology and other linguistic matters, primarily concerning Wales but also including material pertaining to England, Scotland and Ireland, as well as continental Europe. Interspersed among the notes are occasional diary entries and drafts of letters, usually relating to the same topics, as well as containing personal material.

Papers of and relating to Sir Daniel Lleufer Thomas, 1599-1941, comprising general correspondence of Sir Daniel Lleufer Thomas, 1893-1919 and 1922-1940; general correspondence of Lady Thomas, 1895-1941; American letters from descendants of relatives who emigrated, 1873-1931; letters of Welsh interest mainly concerning localities and place-names, 1892-1919; letters relating to T.E. Ellis, 1898-1935; personal letters and cards from Daniel Lleufer Thomas to his wife, 1902; political letters, 1906-1933; papers relating to Daniel Lleufer Thomas's legal career and interests, 1891-1938; subject files relating to his public offices, including his appointment to the Welsh Land Commission, 1887-1941, societies and institutions to which he belonged, 1886-1940, Llandovery School, 1880-1935, the translator and poet Richard Morris Lewis, 1866-1933, general literary and historical interests, 1889-1940, and miscellaneous subjects, 1915-1933; and personal papers which include deeds of Brynmaen, once the family home, 1599-1885, and diaries of Daniel Lleufer Thomas and Lady Thomas, 1892-1899.